Answer:
5n
Step-by-step explanation:
cost of one helmet = $5
let 'n' be the number of person that is n=1,2,3,4........
note that the value of n is always a natural number
therefore the expression = 5n
where 5 is the cost one helmet
n is the number of persons
Deposit: = $600 on 1st April
Futher Depost = $200 on1st July
Interest rate = 2.60% per annum
Compounded = quarterly
720$
(1000+(230*24))-5800=720
18. x=31
19.x=15
20. a. x=5 WXY= 28
b. YXZ=28
c. WXZ=56
